Write me some moon-letters

The love of letters, maps and handwriting all bundled into one exuberant quotation. I now need to figure out the technicalities of writing this way.

“What are moon-letters?” asked the hobbit full of excitement. ‘He loved maps, as I have told you before; and he also liked runes and letters and cunning handwriting, though when he wrote himself it was a bit thin and spidery. “Moon-letters are rune-letters, but you cannot see them,” said Elrond, “not when you look straight at them. They can only be seen when the moon shines behind them…”’